Wildland Fire Department Drone Guide

Wildland fire departments operate in environments where conditions can change extremely quickly. Wind, terrain, vegetation, temperature and humidity can all influence how a wildfire develops, while smoke and difficult access can make it hard for crews to understand what is happening across the complete incident area. Drones provide fire departments with an additional aerial layer of situational awareness. Equipped with thermal cameras, high-resolution RGB sensors and mapping payloads, drones can help teams identify hotspots, map fire boundaries, inspect difficult terrain and monitor changing conditions from above. The greatest value comes from integration with the incident command structure. Drone imagery should support firefighters, air operations, dispatch, GIS teams and emergency managers rather than operate as a separate information source. Live video, thermal data and georeferenced maps can all contribute to the same common operational picture. Drones do not replace firefighters, lookout towers, satellites, crewed helicopters or fixed-wing firefighting aircraft. Their role is to provide high-resolution local information quickly and repeatedly, particularly where sending personnel or crewed aircraft solely to obtain an initial view would be inefficient or unnecessarily risky. ## **Early Fire Detection** Early detection is one of the most important applications for wildland fire drones. A small ignition can develop rapidly under dry, windy conditions, and the earlier authorities understand where a fire is located, the sooner they can assess the appropriate response. Thermal-equipped drones can support authorised patrols across selected high-risk areas or investigate alerts from other monitoring systems. A fixed camera, satellite observation, public report or environmental sensor may indicate a possible incident, after which a drone can provide closer aerial information. The drone should be treated as one layer within a wider detection network. Dense canopy, weather and terrain can all prevent reliable detection, so no single aerial system should be expected to identify every ignition. ## **Thermal Imaging** Thermal imaging is one of the most valuable drone capabilities for wildland fire departments. Instead of relying only on visible flames or smoke, a thermal sensor detects differences in infrared radiation associated with surface temperature. This can help crews identify areas of elevated heat, especially after sunset or when visible conditions are difficult. Thermal imagery can also support post-fire hotspot searches and help determine whether areas that appear inactive visually still contain significant heat. Interpretation remains important. Sun-heated rocks, vehicles and other surfaces can also appear warm, so thermal imagery should be reviewed by trained personnel within the wider incident context. ## **RGB Cameras** High-resolution RGB cameras provide important visual context alongside thermal imagery. They can show smoke, flames, vegetation, roads, buildings and surrounding terrain in a form that is easy for incident commanders to interpret. Wide-angle views help teams understand the overall environment, while optical zoom can provide more detail from a greater stand-off distance. Combining visual and thermal sensors allows crews to compare what is physically visible with what the thermal camera is detecting. This combination is often more useful than relying on either sensor independently. ## **Fire Perimeter Mapping** Understanding the current fire perimeter is essential for incident planning. A drone can collect georeferenced imagery across suitable sections of the incident and help produce an updated map of the visible affected area. The information can be transferred into GIS and compared with previous mapping. Repeat surveys can show how the perimeter has changed over time and help command teams understand where fire activity has increased, decreased or shifted. Drone mapping is especially valuable when ground access is limited, but it should remain coordinated with other authoritative fire-mapping sources. ## **Hotspot Detection** After active flames have reduced, residual heat can remain in vegetation, stumps, roots and debris. These hotspots may continue to require attention. Thermal drones can survey suitable areas and identify temperature anomalies for firefighters to investigate. Ground crews can then focus on specific locations rather than searching a large burned area entirely by foot. This can improve the efficiency of mop-up operations while reducing the amount of unnecessary movement through difficult or unstable terrain. ## **Night Operations** Night-time can provide useful conditions for thermal wildfire surveys because the surrounding terrain may cool while active hotspots remain warmer. This can increase thermal contrast in some environments. Drones can support authorised night operations where crew training, aircraft lighting and aviation rules allow. Thermal data may provide useful information for overnight incident management and early morning planning. However, darkness also reduces visual references for pilots and can complicate obstacle awareness, so night operations require appropriate procedures and equipment. ## **Fire Behaviour Situational Awareness** Drone imagery can provide useful context about visible fire behaviour and surrounding terrain. Incident commanders may be able to observe where smoke and active fire are concentrated and how the incident relates to roads, ridges, vegetation and infrastructure. This information should complement professional fire-behaviour analysis rather than replace it. Wind, fuels and atmospheric conditions can change rapidly, and a drone image only represents conditions at a specific moment. The greatest value comes from repeated observations combined with weather and ground reports. ## **Terrain Mapping** Terrain has a major influence on wildfire operations. Slopes, valleys, ridges, roads and natural barriers affect both fire behaviour and crew access. Drone photogrammetry or LiDAR can create detailed terrain products for selected areas. These maps can help incident teams understand access, surrounding topography and potential hazards. For longer-term planning, the same data can support fuel-management and wildfire-risk assessment programmes. ## **GIS Integration** GIS is one of the most important tools for wildland fire departments using drones. Drone position, thermal observations, fire perimeter information, roads, structures and water sources can all be displayed within the same geographic environment. Potential hotspots can be marked with coordinates and assigned to ground crews for verification. Historical flights can also remain available for comparison. This turns drone data into operational information rather than leaving it as a collection of separate videos and photographs. ## **Live Video to Incident Command** Live drone video can be transmitted securely to authorised incident-command personnel. Instead of relying solely on radio descriptions from the pilot, commanders can see the relevant aerial view themselves. This can improve coordination when conditions are changing quickly. It can also help operations teams understand where access routes, structures or other visible features are located relative to the fire. Video should remain one input among many, particularly when smoke or terrain limits what the camera can see. ## **Supporting Ground Crews** Drones can provide useful information before ground crews enter difficult areas. Aerial imagery may reveal blocked roads, fallen trees, damaged bridges or other access problems. This can help teams avoid wasting time on routes that are no longer usable and may reduce exposure to unnecessary hazards. Once crews are deployed, the drone can continue providing broader situational awareness from above where authorised. The aircraft does not replace the judgement of experienced firefighters operating on the ground. ##